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Long Life Coolant mix with Super Life Coolant on Gen3

Discussion in 'Gen 3 Prius Care, Maintenance & Troubleshooting' started by Tekken, Aug 11, 2019.

  1. Tekken

    Tekken Member

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    A search showing Gen 3 can be use with Long Life Coolant but can only last 30K miles while Super Long Life Coolant last 50K miles.

    Since my 2013 Prius had Super Long Life Coolant in system. Even if I drain and refill with LLC on my 2013 prius, I could mixed with SLLC and LLC in my coolant system. That's no way to completely drain all the SLLC out on inventer and engine right?

    I purchase the LLC on amazon by mistake, should I use it? It need be mix 50/50 with distill water.

    I also has asked Toyota Dealer, they offer LLC and SLLC. for 2013 Prius.
     
    #1 Tekken, Aug 11, 2019
  2. RRxing

    RRxing Senior Member

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    Both the 2013 and 2017 Maintenance Guides state that SLLC should be replaced at 100,000 miles.
     
    #2 RRxing, Aug 12, 2019
  3. Patrick Wong

    Patrick Wong DIY Enthusiast

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    This is correct. However as already pointed out, the change interval for the factory fill is 100K miles.

    It is OK to mix the LLC and SLLC. It is correct that the engine coolant loop will contain some old coolant after a drain, perhaps 1/3 of the total capacity. The inverter/transaxle will mostly be drained. You can use the LLC if you are willing to observe the 30K mile change interval.
     
    #3 Patrick Wong, Aug 12, 2019
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